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Mechanical Ring
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Jerry Durand
On 12/07/2012 10:19 PM, Marcos wrote:
Can some one please teach me how to make this.Without seeing it up close, I'd say you have the upper and lower gears as you can see. These are held in by two tubes with flared ends (T-shape in side view). One tube fits inside the other and the screws from the planetary gears go through both tubes to lock it. Anyway, that's my first impression. -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
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Do you think the tubes have some kind of locking lip that you have to press together?
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--- In 7x12minilathe@..., Jerry Durand <jdurand@...> wrote:
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What machines do you have available??
Unless you intend filing the teeth by hand, a small mill?and a rotary table are almost essential, and even then due to the size of the parts it will be tedious work.
Ideally a CNC mill with the rotab as the 4th axis would be best.?
You could cut and size the parts on your lathe then transfer them to a chuck or collet on the rotab for correct indexing to a cutter on the mill. |
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Jerry Durand
On 12/08/2012 09:12 AM, Marcos wrote:
Do you think the tubes have some kind of locking lip that you have to press together?I was thinking the tubes telescoped inside each other and the screws go through both. -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
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Ian 1
开云体育Hi Jerry, If they were bolted, they could not turn relative to each other.? ?Favour the press-fit idea All the best Ian On 8 Dec 2012, at 17:33, Jerry Durand <jdurand@...> wrote:
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Jerry Durand
开云体育On 12/08/2012 09:36 AM, Ian 1 wrote:
I may have missed something in the video, I was thinking the outer gear rings were separate gear rings sliding on the tubes. -- Jerry Durand, Durand Interstellar, Inc. tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
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Mark irrelevant
How about a single "tube", spin or press a lip the width of the ring gear on one end.? Blind drill and tap for the gear fixing screws. Drop one ring gear onto the tube Fit the "fixed gears" Drop the top ring gear onto the tube Spin or press the top "lip" to trap the top gear - if that lip extends beyond the width of the ring gear, machine down to size ? Just idle thoughts From: Jerry Durand To: 7x12minilathe@... Sent: Saturday, 8 December 2012, 17:40 Subject: Re: [7x12minilathe] Re: Mechanical Ring
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On 12/08/2012 09:36 AM, Ian 1 wrote:
I may have missed something in the video, I was thinking the outer gear rings were separate gear rings sliding on the tubes. -- Jerry Durand, Durand Interstellar, Inc. tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
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Jerry Durand
开云体育On 12/08/2012 09:51 AM, Mark irrelevant wrote:
That works.? Lets you get the sliding bits as tight as you wish.? My version could be disassembled, your's can't.? Not that that should be a problem. -- Jerry Durand, Durand Interstellar, Inc. tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
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MERTON B BAKER
Grooved.
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Mert -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]On Behalf Of Jerry Durand Sent: Saturday, December 08, 2012 12:40 PM To: 7x12minilathe@... Subject: Re: [7x12minilathe] Re: Mechanical Ring On 12/08/2012 09:36 AM, Ian 1 wrote: Hi Jerry, If they were bolted, they could not turn relative to each other.?? ??Favour the press-fit idea All the best Ian I may have missed something in the video, I was thinking the outer gear rings were separate gear rings sliding on the tubes. -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
Can some one please teach me how to make this. Whenever you see the word 'patent', head over to Google: Unfortunately this is only a design patent, so the details are missing. A design patent isn't a 'real' patent, but anyway. You need to look closely, but there are a few hints. The big one is the ring is in two halves, on the picture you can see the line where the left half is pressed on. The holes in the gears are countersunk, so the shafts are flared (or flanged) to stop them coming out (like wood screws). The trick is where the shafts poke out under the gears they have a hole drilled though them. There's a pin used to lock the shafts on. I'm guessing the groove on top of the shafts is used to align them during assembly, this would be needed if the left half & pins were one piece. Or it's just decorative. So make the right half, drill to hold the shafts (but not through the ring), drop the gears on, slide in the locking pins, and press the left half on. My initial thought was the gears were bevelled, and the rack was also in the opposite direction just enough to stop them falling out. I found this: but it's wrong - it doesn't match the patent drawings. That's quite a fiddly build. Good luck! Tony |
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Just a 7x16 lathe. I might have to save up for a mini mill.
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--- In 7x12minilathe@..., Aquila <myycc0q0@...> wrote:
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Thanks for the details.
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--- In 7x12minilathe@..., "Tony Smith" <ajsmith1968@...> wrote:
Can some one please teach me how to make this. |
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I'm not entirely sure I'm correct.
The way I think it is you have the large (right hand) piece of the ring, it has a flange on it The left is similar. There are holes drilled and slots for the shafts. The first gear ring goes on, then the gears drop into the holes. The pins slide in next (held in either by the flange or the gear ring), then the left-hand side is pressed on. You'd think the gears would be pressed into the ring, but that doesn't seem to be the case. It's mostly a low precision piece (cast pieces?) so maybe that's the trade-off, trying to reduce any precision machining. You could always buy one to see how it works. Tony Thanks for the details.though them.half on.There's a pin used to lock the shafts on. this: but it's wrong - it doesn't |
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Ian Newman
开云体育Hi Marcos, You can index using the lathe and change wheels and also perform any milling required (with a bit of ingenuity). The gears are simple and low precision and would be straight forward to make by hand, or you could buy a length of pinion wire and part off gears as required. There is an automatic assumption that using a machine is the best or only way to make something - I have a lathe and a mill and use them when hand tools are not appropriate. ?It is often quicker to cut and file by hand than to set-up a job on a machine. Look at what watchmakers produced with a pair of turns..... All the best, Ian. On 9 Dec 2012, at 08:01, "Marcos" <stilettomantool@...> wrote:
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MERTON B BAKER
And I wouldn't run my fingers thru the hair on my head, wearing one of those
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either. Looks like an excellent device for testing Murphy's Law. How would you cut the ring gears? Mert -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]On Behalf Of Jerry Durand Sent: Saturday, December 08, 2012 10:37 PM To: 7x12minilathe@... Subject: Re: [7x12minilathe] Mechanical Ring I showed the videos to my wife who said "I hope you don't have hairy fingers!" ouch! -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand ------------------------------------ Yahoo! Groups Links |
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Ian 1
开云体育Hi Mert, I would make the toothed rings in two pieces. First, cut the teeth across the end of a tube (with an even number of teeth you could cut right across and cut opposite teeth in a single operation) Then solder/braze/sweat the toothed ring over a smaller tube which would form the main body of the part. All the best, Ian On 9 Dec 2012, at 10:42, "MERTON B BAKER" <mertbaker@...> wrote:
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开云体育The toothed bits move independently of the ring body, no need for solder. ? Tony ? ? ? Hi Mert, ? I would make the toothed rings in two pieces. ? First, cut the teeth across the end of a tube (with an even number of teeth you could cut right across and cut opposite teeth in a single operation) ? Then solder/braze/sweat the toothed ring over a smaller tube which would form the main body of the part. ? All the best, Ian On 9 Dec 2012, at 10:42, "MERTON B BAKER" <mertbaker@...> wrote:
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Hi Ian,
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I haven't looked real closely at the design, but I wonder if one could cut across the end of a solid round with a single tooth gear cutter, keeping in mind your idea of an even number of teeth, and then bore it out, turn the outside to the desired shape, then part it off to avoid having to solder or braze (?). Just a thought. Frank --- In 7x12minilathe@..., Ian 1 <ian_new@...> wrote:
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